The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be Normally distributed with mean μ and standard deviation σ = 10. A simple random sample of 30 children from this population is taken and each is given the WISC. The mean of the 30 scores is 104.32.
Suppose a histogram of the 30 WISC scores is the following.

Based on this histogram, we would conclude that any confidence interval constructed from this sample

Question

The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be Normally distributed with mean μ and standard deviation σ = 10. A simple random sample of 30 children from this population is taken and each is given the WISC. The mean of the 30 scores is 104.32. 
 Suppose a histogram of the 30 WISC scores is the following. 
                     
 Based on this histogram, we would conclude that any confidence interval constructed from this sample

Accepted Answer

may be used with some reservation due to the sample size just being large enough for the Central Limit Theorem to apply.

Answer

is completely reliable as skew does not matter at any sample size.

Answer

may be used with some reservation due to the very small sample size.

Answer

is completely unreliable due to the skew.

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The scores of a certain population on the Wechsler Intelligence Scale for Child...

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